William b



(No Model.)

' W. B. POPE.

Heater fog Oars.

No. 240,267. Patented-April 19,1881.

I -PEIERS, FHDTD-UTHOGRAPHER, WA$HINGTON4 n c.

UNITED STATES PATENT OFFICE.

WILLIAM B. POPE, OF NEW YORK, N. Y.

HEATER FOR CARS.

SPECIFICATION forming part of Letters Patent No. 240,267, dated April 19,- 1881.

v Application filed July 19,1880. (No model.)

To all whom it may concern Be it known that I. WILLIAM B. POPE, of the city and State of New York, have invented an Improvement in Heaters for Cars, 8230., of which the following is a specification.

Sand has been introduced between two cases, leaving a central space for the heating devices, such as a slug of metal or a steam-pipe. In this character of heater the sand prevents the rapid radiation of heat and promotes its continuity, but it also prevents the car from becoming heated with rapidity when the heat is first applied. In practice it is found important to heat the car rapidly when first brought into use after remaining over night or out of use, and then to supplythe heat more gradually to maintain the proper temperature of the car.

My improvement is made for accomplishing these objects; and it consists in combining with the steam-heating pipe a compound case that can be opened to allow of direct radiation in heating up a cold car rapidly, or closed to retain the steam-heat to a greater or less extent and render the heat more continuous and and Fig. 4 is an end view of a modification of the compound case.

The steam-pipe a is of usual character, and bis an inner and 0 anouter semi-cylindrical case, united by radial plates at to form a halfcase at one side of the steam-pipe. The other half-case is similarly made of the outer case,

The filling of these cases is gravel or pebbles.

in preference to sand, for the purposes before mentioned, and the cases are either made of sheet metal or perforated with numerous small holes or of wire netting, so as to allow of the air circulating through the casing and between the pebbles and thereby conveying the heat from the steam-pipe to the atmosphere with the required rapidity.

I claim as my invention- 1. The combination, with a steam-heating pipe, of a surrounding case made in two or more sections, containing pebbles or similar material, and capable of being opened to expose or partially expose the steam-pipe when required, substantially as specified.

2. The combination, with a steam-heating pipe, of a perforated or open-work case and a filling of pebbles or other particles of matter, between which the air may circulate, as set forth.

3. The combination, with a heating-pipe, of a surrounding case made in sections so as to be opened and of perforated or open-work material, and a filling of pebbles or similar material, substantially as set forth.

Signed by me this 14th day of July, A. D. 1880.

, WILLIAM B. POPE.

Witnesses:

WILLIAM G. MOTT, GEo. T. PINGKNEY. 

